Quarterly report pursuant to Section 13 or 15(d)

Cash, Cash Equivalents and Short-Term Investments (Details)

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Cash, Cash Equivalents and Short-Term Investments (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Sep. 30, 2020
Dec. 31, 2019
Cash, cash equivalent and short term investments        
Cash and cash equivalents $ 30,403 $ 30,373 $ 36,567 $ 22,521
Short-term investments 112,743 26,954    
Cash, cash equivalents and short-term investments 143,146 57,327    
Money market funds        
Cash, cash equivalent and short term investments        
Cash, cash equivalents and short-term investments 25,794 19,487    
U.S. treasury bills        
Cash, cash equivalent and short term investments        
Cash, cash equivalents and short-term investments 37,991 10,034    
Government-sponsored enterprises securities        
Cash, cash equivalent and short term investments        
Cash, cash equivalents and short-term investments 14,735 4,920    
Corporate bonds and commercial paper        
Cash, cash equivalent and short term investments        
Cash, cash equivalents and short-term investments 62,016 20,898    
Cash        
Cash, cash equivalent and short term investments        
Cash, cash equivalents and short-term investments $ 2,610 $ 1,988